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Finding the Fourth Proportional to 637,627,440.80, 879,898,681.28 and 355,354,861.52

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Solution

The fourth proportional to 637,627,440.80, 879,898,681.28 and 355,354,861.52 is: 490,374,557.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,627,440.80 : 879,898,681.28 = 355,354,861.52 : x
  2. Step 2: Convert to fraction form
    637,627,440.80/879,898,681.28 = 355,354,861.52/x
  3. Step 3: Cross multiply
    637,627,440.80x = 879,898,681.28 × 355,354,861.52
  4. Step 4: Simplify right side
    637,627,440.80x = 312,676,274,037,884,992
  5. Step 5: Solve for x
    x = 312,676,274,037,884,992/637,627,440.80
  6. Step 6: Final answer
    x = 490,374,557.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.